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Household endotoxin levels and the risk of non-Hodgkin lymphoma.
MedLine Citation:
PMID:  23277417     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: Endotoxin, a component of the outer membrane of gram-negative bacteria, elicits a strong innate and inflammatory immune response associated with the secretion of proinflammatory cytokines, including tumor necrosis factor-alpha (TNF-α). Because TNF-α polymorphisms that increase TNF-α production are associated with an increased risk of non-Hodgkin lymphoma (NHL), we hypothesized that increased levels of household endotoxin would be associated with an increased NHL risk. METHODS: We evaluated this association in the National Cancer Institute/Surveillance, Epidemiology and End Results (NCI/SEER) NHL multicenter population-based case-control study. Used vacuum cleaner bags were collected from participants during a home interview. Dust samples from the bags of 594 cases and 442 controls were analyzed for endotoxin [endotoxin unit (EU)/mg of dust] using the kinetic chromogenic Limulus amebocyte lysate assay. Multivariable logistic regression was used to estimate the effect of endotoxin on NHL risk adjusted for age, sex, race, education, study center, and farm exposure. RESULTS: Endotoxin was not associated with NHL overall [odds ratio (OR) for highest quartile of endotoxin levels = 0.81, 95 % confidence interval (CI) = 0.55, 1.20; p for trend = 0.35] or with diffuse large B-cell lymphoma (OR = 0.63, 95 % CI = 0.34, 1.16; p = 0.31) or follicular lymphoma (OR = 1.07, 95 % CI = 0.61, 1.89; p = 0.73) subtypes. Both working and living on a farm were associated with higher household endotoxin levels compared to never working (p = 0.009) or living (p = 0.01) on a farm. Excluding farmers from the analysis did not change the results. CONCLUSIONS: We found no evidence of a role for household endotoxin in NHL etiology.
Authors:
Jun Wang; Wendy Cozen; Peter S Thorne; Kiros Berhane; James R Cerhan; Patricia Hartge; Mary H Ward; Anneclaire J De Roos; Richard K Severson; Lindsay M Morton; Leslie Bernstein; Martha S Linet; Joanne S Colt
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-1
Journal Detail:
Title:  Cancer causes & control : CCC     Volume:  -     ISSN:  1573-7225     ISO Abbreviation:  Cancer Causes Control     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9100846     Medline TA:  Cancer Causes Control     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Preventive Medicine, USC Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
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